/* ===== 全局样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 教室投屏：全局放大 + 加粗 */
html {
  font-size: 19px;
}
body {
  font-weight: 500;
}

:root {
  --sepia-dark: #2c1810;
  --sepia-mid: #5d4037;
  --sepia-light: #8d6e63;
  --gold: #d4a574;
  --gold-light: #e6c9a8;
  --text-primary: #f5f0e8;
  --text-secondary: #c4b5a0;
  --overlay-bg: rgba(44, 24, 16, 0.95);
}

body {
  font-family: 'Noto Serif SC', 'Georgia', serif;
  background: var(--sepia-dark);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

#game-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ===== HUD ===== */
#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(44, 24, 16, 0.9), transparent);
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#year-location {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
}

#year-location span {
  margin-right: 20px;
}

#stats-bar {
  display: flex;
  gap: 15px;
}

.stat {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: help;
  transition: color 0.3s;
}

.stat:hover {
  color: var(--gold);
}

.stat .icon {
  font-size: 1.4rem;
}

/* HUD 音量控制 */
#hud-volume {
  display: flex;
  align-items: center;
  gap: 8px;
}

.vol-btn {
  background: none;
  border: 1px solid var(--gold);
  border-radius: 6px;
  color: var(--gold);
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  cursor: pointer;
  line-height: 1;
  transition: background 0.3s;
}

.vol-btn:hover {
  background: rgba(212, 165, 116, 0.2);
}

#hud-volume-slider {
  width: 110px;
  accent-color: var(--gold);
  cursor: pointer;
}

/* ===== 主显示区 ===== */
#main-display {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#background-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: opacity 0.5s;
}

#background-layer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#character-layer {
  position: absolute;
  bottom: 240px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

/* ===== 对话框 ===== */
#dialogue-box {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 250px;
  background: linear-gradient(to top, rgba(44, 24, 16, 0.98), rgba(44, 24, 16, 0.85));
  border-top: 2px solid var(--gold);
  padding: 20px 30px;
  z-index: 50;
  cursor: pointer;
  transition: all 0.3s;
}

#dialogue-box:hover {
  background: linear-gradient(to top, rgba(44, 24, 16, 1), rgba(44, 24, 16, 0.9));
}

#speaker-info {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 10px;
}

#speaker-portrait {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  object-fit: cover;
}

#speaker-name {
  font-size: 1.6rem;
  color: var(--gold);
  font-weight: 700;
}

#dialogue-text {
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 80px;
}

#continue-hint {
  position: absolute;
  bottom: 10px;
  right: 30px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ===== 选择按钮 ===== */
#choices-container {
  position: absolute;
  bottom: 270px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 60;
  min-width: 520px;
}

.choice-btn {
  background: linear-gradient(135deg, var(--sepia-mid), var(--sepia-dark));
  border: 2px solid var(--gold);
  color: var(--text-primary);
  padding: 18px 30px;
  font-size: 1.5rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.3s;
  text-align: left;
}

.choice-btn:hover {
  background: linear-gradient(135deg, var(--gold), var(--sepia-mid));
  color: var(--sepia-dark);
  transform: scale(1.02);
}

/* ===== 覆盖层通用样式 ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: center;
}

.overlay.hidden {
  display: none;
}

.history-content,
.menu-content,
.settings-content,
.report-content,
.save-select-content {
  background: linear-gradient(135deg, var(--sepia-dark), var(--sepia-mid));
  border: 3px solid var(--gold);
  border-radius: 15px;
  padding: 40px;
  max-width: 700px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.history-content h2,
.menu-content h2,
.settings-content h2,
.report-content h2,
.save-select-content h2 {
  color: var(--gold);
  margin-bottom: 20px;
  text-align: center;
  font-size: 1.9rem;
  font-weight: 700;
}

.history-content p,
.report-content p {
  line-height: 1.8;
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.history-content button,
.menu-content button,
.settings-content button,
.report-content button,
.save-select-content > button {
  display: block;
  width: 100%;
  margin-top: 20px;
  padding: 14px;
  background: var(--gold);
  color: var(--sepia-dark);
  border: none;
  border-radius: 5px;
  font-size: 1.3rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}

.history-content button:hover,
.menu-content button:hover,
.settings-content button:hover,
.report-content button:hover,
.save-select-content > button:hover {
  background: var(--gold-light);
  transform: scale(1.02);
}

/* ===== 存档选择面板 ===== */
#save-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.save-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(0, 0, 0, 0.25);
  border: 2px solid rgba(212, 175, 55, 0.4);
  border-radius: 10px;
  padding: 14px 16px;
  transition: all 0.3s;
}

.save-row.save-current {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.12);
}

.save-info {
  flex: 1;
  min-width: 0;
}

.save-name {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.save-name .save-chapter {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
  margin-left: 8px;
}

.save-meta {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.save-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.save-actions button {
  padding: 8px 14px;
  border: none;
  border-radius: 5px;
  font-size: 0.95rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}

.save-enter {
  background: var(--gold);
  color: var(--sepia-dark);
}

.save-enter:hover {
  background: var(--gold-light);
  transform: scale(1.05);
}

.save-delete {
  background: transparent;
  color: #e57373;
  border: 2px solid #e57373 !important;
}

.save-delete:hover {
  background: #e57373;
  color: var(--sepia-dark);
}

.save-status,
.save-empty {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  padding: 20px 0;
}

/* ===== 设置面板 ===== */
.settings-content label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 15px 0;
  font-size: 1.3rem;
  font-weight: 600;
}

.settings-content input[type="range"] {
  flex: 1;
}

/* ===== 革命报告 ===== */
#report-stats {
  margin: 20px 0;
}

.stat-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
}

.stat-bar .label {
  width: 110px;
  color: var(--text-secondary);
  font-size: 1.15rem;
  font-weight: 600;
}

.stat-bar .bar {
  flex: 1;
  height: 26px;
  background: var(--sepia-dark);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--gold);
}

.stat-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transition: width 0.5s;
}

.stat-bar .value {
  width: 55px;
  text-align: right;
  color: var(--gold);
  font-size: 1.15rem;
  font-weight: 700;
}

#report-exam-mapping {
  margin-top: 20px;
  padding: 15px;
  background: rgba(212, 165, 116, 0.1);
  border-left: 4px solid var(--gold);
}

#report-exam-mapping h3 {
  color: var(--gold);
  margin-bottom: 10px;
}

#report-exam-mapping ul {
  list-style: none;
  padding-left: 0;
}

#report-exam-mapping li {
  padding: 5px 0;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

#report-exam-mapping li::before {
  content: "✓ ";
  color: var(--gold);
}

/* ===== 结算综合打分 ===== */
.score-panel {
  text-align: center;
  padding: 18px;
  border-radius: 12px;
  border: 2px solid var(--gold);
  margin-bottom: 18px;
}

.score-number {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--gold-light);
  line-height: 1.1;
}

.score-max {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.score-grade {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 6px;
}

.score-note {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.score-panel.grade-s { border-color: #ffd700; box-shadow: 0 0 18px rgba(255, 215, 0, 0.35); }
.score-panel.grade-s .score-grade { color: #ffd700; }
.score-panel.grade-a { border-color: #4caf50; }
.score-panel.grade-a .score-grade { color: #81c784; }
.score-panel.grade-b { border-color: #4fc3f7; }
.score-panel.grade-b .score-grade { color: #4fc3f7; }
.score-panel.grade-c { border-color: #ffb74d; }
.score-panel.grade-c .score-grade { color: #ffb74d; }
.score-panel.grade-d { border-color: #9e9e9e; }
.score-panel.grade-d .score-grade { color: #bdbdbd; }

/* ===== 排行榜 ===== */
#report-leaderboard {
  margin-top: 18px;
  padding: 15px;
  background: rgba(44, 24, 16, 0.6);
  border: 1px solid var(--sepia-light);
  border-radius: 10px;
}

#report-leaderboard h3 {
  color: var(--gold);
  margin-bottom: 10px;
  text-align: center;
  font-size: 1.25rem;
}

.lb-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lb-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  background: rgba(212, 165, 116, 0.08);
  border-radius: 6px;
  font-size: 1.05rem;
}

.lb-row.lb-me {
  background: rgba(212, 165, 116, 0.22);
  border: 1px solid var(--gold);
}

.lb-rank {
  width: 34px;
  text-align: center;
  font-weight: 700;
  color: var(--gold);
}

.lb-name {
  flex: 1;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lb-personality {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.lb-score {
  width: 48px;
  text-align: right;
  font-weight: 700;
  color: var(--gold-light);
}

.lb-del {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.35);
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.15s;
  padding: 0;
}

.lb-del:hover {
  opacity: 1;
  color: #ff7b7b;
  background: rgba(0, 0, 0, 0.6);
}

.lb-mine, .lb-status, .lb-empty {
  text-align: center;
  color: var(--text-secondary);
  margin-top: 10px;
  font-size: 0.95rem;
}

.report-buttons {
  display: flex;
  gap: 12px;
}

.report-buttons button {
  flex: 1;
}

/* ===== 动画类 ===== */
.fade-in {
  animation: fadeIn 0.5s forwards;
}

.fade-out {
  animation: fadeOut 0.5s forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

.slide-up {
  animation: slideUp 0.3s forwards;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ===== 开始菜单 & 介绍画面 ===== */
#start-menu,
#intro-screen {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  background:
    linear-gradient(rgba(44, 24, 16, 0.85), rgba(44, 24, 16, 0.95)),
    url('../assets/backgrounds/01_prologue_manila.jpg') center/cover no-repeat;
  animation: fadeIn 0.6s forwards;
}

.start-content,
.intro-content {
  background: linear-gradient(135deg, rgba(44, 24, 16, 0.95), rgba(93, 64, 55, 0.9));
  border: 3px solid var(--gold);
  border-radius: 20px;
  padding: 50px 60px;
  max-width: 700px;
  width: 90%;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.start-content h1,
.intro-content h1 {
  font-size: 3.2rem;
  color: var(--gold);
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
  margin-bottom: 10px;
}

.start-content h2,
.intro-content h2 {
  font-size: 2rem;
  color: var(--gold-light);
  margin-bottom: 30px;
}

.start-content p,
.intro-content p {
  line-height: 1.8;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.intro-text {
  margin-bottom: 30px;
}

.start-content button,
.intro-content button {
  display: block;
  width: 100%;
  margin-top: 20px;
  padding: 16px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--sepia-dark);
  border: none;
  border-radius: 10px;
  font-size: 1.4rem;
  font-weight: bold;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s;
}

.start-content button:hover,
.intro-content button:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 20px rgba(212, 165, 116, 0.4);
}

.intro-content input[type="text"] {
  width: 100%;
  padding: 14px;
  font-size: 1.4rem;
  font-weight: 600;
  font-family: inherit;
  background: var(--sepia-dark);
  color: var(--text-primary);
  border: 2px solid var(--gold);
  border-radius: 8px;
  outline: none;
  text-align: center;
  margin-bottom: 10px;
  transition: border-color 0.3s;
}

.intro-content input[type="text"]:focus {
  border-color: var(--gold-light);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  #hud {
    flex-direction: column;
    gap: 10px;
  }

  #stats-bar {
    flex-wrap: wrap;
    justify-content: center;
  }

  #dialogue-box {
    height: 200px;
    padding: 15px 20px;
  }

  #choices-container {
    bottom: 220px;
    min-width: auto;
    width: 92%;
  }

  .choice-btn {
    padding: 14px 20px;
    font-size: 1.2rem;
  }
}

/* ===== 结局动画播放器 ===== */
.ending-video-content {
  position: relative;
  width: min(1100px, 92vw);
  aspect-ratio: 16 / 9;
  max-height: 80vh;
  border: 3px solid var(--gold);
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.8);
}

#ending-video,
#ending-video-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 静帧回退：Ken Burns 缓慢运镜 */
#ending-video-fallback:not(.hidden) {
  animation: kenburns 14s ease-in-out infinite alternate;
}

@keyframes kenburns {
  from { transform: scale(1) translateX(0); }
  to { transform: scale(1.12) translateX(-2.5%); }
}

#ending-video-title {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18%;
  text-align: center;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--gold);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
  letter-spacing: 0.15em;
}

#ending-video-subtitle {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 9%;
  text-align: center;
  font-size: 1.2rem;
  color: #f5e6c8;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.9);
}

.type-cursor::after {
  content: '▌';
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {
  50% { opacity: 0; }
}

#btn-skip-ending {
  position: absolute;
  right: 14px;
  bottom: 12px;
  z-index: 5;
  padding: 8px 18px;
  background: rgba(0, 0, 0, 0.55);
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  backdrop-filter: blur(3px);
}

#btn-skip-ending:hover {
  background: var(--gold);
  color: var(--sepia-dark);
}